155797850 has 24 divisors (see below), whose sum is σ = 312076380. Its totient is φ = 57525120.

The previous prime is 155797849. The next prime is 155797871. The reversal of 155797850 is 58797551.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 61105489 + 94692361 = 7817^2 + 9731^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155797795 and 155797804.

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, 119195 + ... + 120494.

Almost surely, 2^155797850 is an apocalyptic number.

155797850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155797850 is an abundant number, since it is smaller than the sum of its proper divisors (156278530).

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

155797850 is a wasteful number, since it uses less digits than its factorization.

155797850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239714 (or 239709 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 47.

The square root of 155797850 is about 12481.9008968987. The cubic root of 155797850 is about 538.0886358204.

The spelling of 155797850 in words is "one hundred fifty-five million, seven hundred ninety-seven thousand, eight hundred fifty".