172745740 has 48 divisors (see below), whose sum is σ = 370349280. Its totient is φ = 67668480.

The previous prime is 172745737. The next prime is 172745743. The reversal of 172745740 is 47547271.

It is an interprime number because it is at equal distance from previous prime (172745737) and next prime (172745743).

It is a self number, because there is not a number n which added to its sum of digits gives 172745740.

It is not an unprimeable number, because it can be changed into a prime (172745743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261010 + ... + 261670.

It is an arithmetic number, because the mean of its divisors is an integer number (7715610).

Almost surely, 2^172745740 is an apocalyptic number.

172745740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172745740 is an abundant number, since it is smaller than the sum of its proper divisors (197603540).

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

172745740 is a wasteful number, since it uses less digits than its factorization.

172745740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 172745740 is about 13143.2773690583. The cubic root of 172745740 is about 556.9323547151.

The spelling of 172745740 in words is "one hundred seventy-two million, seven hundred forty-five thousand, seven hundred forty".