172087902 has 160 divisors (see below), whose sum is σ = 476256000. Its totient is φ = 46294416.

The previous prime is 172087897. The next prime is 172087931. The reversal of 172087902 is 209780271.

172087902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×172087902² = 59228492029523208, 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 79 ways as a sum of consecutive naturals, for example, 1055673 + ... + 1055835.

It is an arithmetic number, because the mean of its divisors is an integer number (2976600).

Almost surely, 2^172087902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172087902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238128000).

172087902 is an abundant number, since it is smaller than the sum of its proper divisors (304168098).

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

172087902 is a wasteful number, since it uses less digits than its factorization.

172087902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 172087902 is about 13118.2278528771. The cubic root of 172087902 is about 556.2244987341.

The spelling of 172087902 in words is "one hundred seventy-two million, eighty-seven thousand, nine hundred two".