155112840 has 256 divisors, whose sum is σ = 551577600. Its totient is φ = 38707200.

The previous prime is 155112833. The next prime is 155112863. The reversal of 155112840 is 48211551.

155112840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1372624 + ... + 1372736.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^155112840 is an apocalyptic number.

155112840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155112840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275788800).

155112840 is an abundant number, since it is smaller than the sum of its proper divisors (396464760).

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

155112840 is a wasteful number, since it uses less digits than its factorization.

155112840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 155112840 is about 12454.4305369615. The cubic root of 155112840 is about 537.2988567729.

The spelling of 155112840 in words is "one hundred fifty-five million, one hundred twelve thousand, eight hundred forty".