155256740 has 24 divisors (see below), whose sum is σ = 326800320. Its totient is φ = 61957728.

The previous prime is 155256719. The next prime is 155256763. The reversal of 155256740 is 47652551.

It is a self number, because there is not a number n which added to its sum of digits gives 155256740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62 + ... + 17621.

It is an arithmetic number, because the mean of its divisors is an integer number (13616680).

Almost surely, 2^155256740 is an apocalyptic number.

155256740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155256740 is an abundant number, since it is smaller than the sum of its proper divisors (171543580).

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

155256740 is a wasteful number, since it uses less digits than its factorization.

155256740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18131 (or 18129 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 155256740 is about 12460.2062583249. The cubic root of 155256740 is about 537.4649582347.

The spelling of 155256740 in words is "one hundred fifty-five million, two hundred fifty-six thousand, seven hundred forty".