172295428 has 12 divisors (see below), whose sum is σ = 304283980. Its totient is φ = 85357152.

The previous prime is 172295423. The next prime is 172295443. The reversal of 172295428 is 824592271.

It can be written as a sum of positive squares in 2 ways, for example, as 39538944 + 132756484 = 6288^2 + 11522^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (172295423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197151 + ... + 198022.

Almost surely, 2^172295428 is an apocalyptic number.

It is an amenable number.

172295428 is a deficient number, since it is larger than the sum of its proper divisors (131988552).

172295428 is a wasteful number, since it uses less digits than its factorization.

172295428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395286 (or 395284 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 172295428 is about 13126.1353032795. The cubic root of 172295428 is about 556.4479982257.

The spelling of 172295428 in words is "one hundred seventy-two million, two hundred ninety-five thousand, four hundred twenty-eight".