155582840 has 48 divisors (see below), whose sum is σ = 407219400. Its totient is φ = 53342016.

The previous prime is 155582821. The next prime is 155582873. The reversal of 155582840 is 48285551.

It is a junction number, because it is equal to n+sod(n) for n = 155582794 and 155582803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37730 + ... + 41649.

Almost surely, 2^155582840 is an apocalyptic number.

155582840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155582840 is an abundant number, since it is smaller than the sum of its proper divisors (251636560).

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

155582840 is a wasteful number, since it uses less digits than its factorization.

155582840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79404 (or 79393 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 38.

The square root of 155582840 is about 12473.2850524631. The cubic root of 155582840 is about 537.8409907682.

It can be divided in two parts, 15 and 5582840, that added together give a palindrome (5582855).

The spelling of 155582840 in words is "one hundred fifty-five million, five hundred eighty-two thousand, eight hundred forty".