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87997052 = 221113153841
BaseRepresentation
bin1010011111010…
…11101001111100
320010120201021002
411033223221330
5140011401202
612422025432
72115651113
oct517535174
9203521232
1087997052
1145743540
1225578278
1315300380
14b988c7a
157ad3302
hex53eba7c

87997052 has 24 divisors (see below), whose sum is σ = 180918192. Its totient is φ = 36921600.

The previous prime is 87997051. The next prime is 87997067. The reversal of 87997052 is 25079978.

It is a junction number, because it is equal to n+sod(n) for n = 87996988 and 87997006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87997051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76349 + ... + 77492.

It is an arithmetic number, because the mean of its divisors is an integer number (7538258).

Almost surely, 287997052 is an apocalyptic number.

It is an amenable number.

87997052 is an abundant number, since it is smaller than the sum of its proper divisors (92921140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87997052 is a wasteful number, since it uses less digits than its factorization.

87997052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153869 (or 153867 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 87997052 is about 9380.6743894029. The cubic root of 87997052 is about 444.7910511695.

It can be divided in two parts, 8799 and 7052, that added together give a palindrome (15851).

The spelling of 87997052 in words is "eighty-seven million, nine hundred ninety-seven thousand, fifty-two".

Divisors: 1 2 4 11 13 22 26 44 52 143 286 572 153841 307682 615364 1692251 1999933 3384502 3999866 6769004 7999732 21999263 43998526 87997052