172948788 has 18 divisors (see below), whose sum is σ = 437176194. Its totient is φ = 57649584.

The previous prime is 172948771. The next prime is 172948807. The reversal of 172948788 is 887849271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 96000804 + 76947984 = 9798^2 + 8772^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×172948788² = 59822566541337888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2402031 + ... + 2402102.

Almost surely, 2^172948788 is an apocalyptic number.

172948788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172948788 is an abundant number, since it is smaller than the sum of its proper divisors (264227406).

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

172948788 is a wasteful number, since it uses less digits than its factorization.

172948788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804143 (or 4804138 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 172948788 is about 13150.9995057410. Note that the first 3 decimals coincide. The cubic root of 172948788 is about 557.1504782277.

The spelling of 172948788 in words is "one hundred seventy-two million, nine hundred forty-eight thousand, seven hundred eighty-eight".