172772748 has 18 divisors (see below), whose sum is σ = 436731204. Its totient is φ = 57590904.

The previous prime is 172772741. The next prime is 172772759. The reversal of 172772748 is 847277271.

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

It is not an unprimeable number, because it can be changed into a prime (172772741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2399586 + ... + 2399657.

Almost surely, 2^172772748 is an apocalyptic number.

172772748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172772748 is an abundant number, since it is smaller than the sum of its proper divisors (263958456).

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

172772748 is a wasteful number, since it uses less digits than its factorization.

172772748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799253 (or 4799248 counting only the distinct ones).

The product of its digits is 307328, while the sum is 45.

The square root of 172772748 is about 13144.3047743120. The cubic root of 172772748 is about 556.9613778046.

The spelling of 172772748 in words is "one hundred seventy-two million, seven hundred seventy-two thousand, seven hundred forty-eight".