155612040 has 64 divisors (see below), whose sum is σ = 469324800. Its totient is φ = 41275392.

The previous prime is 155612027. The next prime is 155612053. The reversal of 155612040 is 40216551.

It is an interprime number because it is at equal distance from previous prime (155612027) and next prime (155612053).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 155612040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19801 + ... + 26519.

It is an arithmetic number, because the mean of its divisors is an integer number (7333200).

Almost surely, 2^155612040 is an apocalyptic number.

155612040 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 155612040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234662400).

155612040 is an abundant number, since it is smaller than the sum of its proper divisors (313712760).

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

155612040 is a wasteful number, since it uses less digits than its factorization.

155612040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6926 (or 6922 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 155612040 is about 12474.4554991390. The cubic root of 155612040 is about 537.8746362408.

Adding to 155612040 its reverse (40216551), we get a palindrome (195828591).

The spelling of 155612040 in words is "one hundred fifty-five million, six hundred twelve thousand, forty".