172378040 has 16 divisors (see below), whose sum is σ = 387850680. Its totient is φ = 68951200.

The previous prime is 172378027. The next prime is 172378043. The reversal of 172378040 is 40873271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 172377988 and 172378006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172378043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154686 + ... + 2154765.

Almost surely, 2^172378040 is an apocalyptic number.

172378040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172378040 is an abundant number, since it is smaller than the sum of its proper divisors (215472640).

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

172378040 is a wasteful number, since it uses less digits than its factorization.

172378040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309462 (or 4309458 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 172378040 is about 13129.2817777668. The cubic root of 172378040 is about 556.5369190160.

The spelling of 172378040 in words is "one hundred seventy-two million, three hundred seventy-eight thousand, forty".