155285740 has 12 divisors (see below), whose sum is σ = 326100096. Its totient is φ = 62114288.

The previous prime is 155285729. The next prime is 155285743. The reversal of 155285740 is 47582551.

It is a super-2 number, since 2×155285740² = 48227322094695200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155285740.

It is not an unprimeable number, because it can be changed into a prime (155285743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3882124 + ... + 3882163.

It is an arithmetic number, because the mean of its divisors is an integer number (27175008).

Almost surely, 2^155285740 is an apocalyptic number.

155285740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155285740 is an abundant number, since it is smaller than the sum of its proper divisors (170814356).

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

155285740 is a wasteful number, since it uses less digits than its factorization.

155285740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764296 (or 7764294 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 155285740 is about 12461.3699086417. The cubic root of 155285740 is about 537.4984200422.

It can be divided in two parts, 155285 and 740, that added together give a square (156025 = 395²).

The spelling of 155285740 in words is "one hundred fifty-five million, two hundred eighty-five thousand, seven hundred forty".