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BaseRepresentation
bin1010011110111…
…10111100010010
320010111001211102
411033132330102
5140003214403
612420544402
72115343232
oct517367422
9203431742
1087944978
1145708400
1225552102
13152b2764
14b973cc2
157ac2b88
hex53def12

87944978 has 24 divisors (see below), whose sum is σ = 153536796. Its totient is φ = 37621760.

The previous prime is 87944971. The next prime is 87944999.

87944978 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 86806489 + 1138489 = 9317^2 + 1067^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87944971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6575 + ... + 14802.

Almost surely, 287944978 is an apocalyptic number.

87944978 is a deficient number, since it is larger than the sum of its proper divisors (65591818).

87944978 is a wasteful number, since it uses less digits than its factorization.

87944978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21418 (or 21407 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 87944978 is about 9377.8983786347. The cubic root of 87944978 is about 444.7032958829.

The spelling of 87944978 in words is "eighty-seven million, nine hundred forty-four thousand, nine hundred seventy-eight".