155005740 has 72 divisors (see below), whose sum is σ = 490639968. Its totient is φ = 39536640.

The previous prime is 155005733. The next prime is 155005757. The reversal of 155005740 is 47500551.

155005740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14581 + ... + 22860.

It is an arithmetic number, because the mean of its divisors is an integer number (6814444).

Almost surely, 2^155005740 is an apocalyptic number.

155005740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155005740 is an abundant number, since it is smaller than the sum of its proper divisors (335634228).

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

155005740 is a wasteful number, since it uses less digits than its factorization.

155005740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37479 (or 37474 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 155005740 is about 12450.1301198020. The cubic root of 155005740 is about 537.1751662672.

The spelling of 155005740 in words is "one hundred fifty-five million, five thousand, seven hundred forty".