172400308 has 12 divisors (see below), whose sum is σ = 307393380. Its totient is φ = 84573632.

The previous prime is 172400303. The next prime is 172400309. The reversal of 172400308 is 803004271.

172400308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 132987024 + 39413284 = 11532^2 + 6278^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172400303) 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, 406393 + ... + 406816.

It is an arithmetic number, because the mean of its divisors is an integer number (25616115).

Almost surely, 2^172400308 is an apocalyptic number.

It is an amenable number.

172400308 is a deficient number, since it is larger than the sum of its proper divisors (134993072).

172400308 is a wasteful number, since it uses less digits than its factorization.

172400308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813266 (or 813264 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 172400308 is about 13130.1297784904. The cubic root of 172400308 is about 556.5608826843.

Adding to 172400308 its reverse (803004271), we get a palindrome (975404579).

The spelling of 172400308 in words is "one hundred seventy-two million, four hundred thousand, three hundred eight".