172401690 has 32 divisors (see below), whose sum is σ = 414118656. Its totient is φ = 45934400.

The previous prime is 172401673. The next prime is 172401731. The reversal of 172401690 is 96104271.

It is a happy number.

It is a super-2 number, since 2×172401690² = 59444685429712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55519 + ... + 58541.

It is an arithmetic number, because the mean of its divisors is an integer number (12941208).

Almost surely, 2^172401690 is an apocalyptic number.

172401690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172401690 is an abundant number, since it is smaller than the sum of its proper divisors (241716966).

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

172401690 is a wasteful number, since it uses less digits than its factorization.

172401690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 172401690 is about 13130.1824054352. The cubic root of 172401690 is about 556.5623698531.

The spelling of 172401690 in words is "one hundred seventy-two million, four hundred one thousand, six hundred ninety".