8172404 has 6 divisors (see below), whose sum is σ = 14301714. Its totient is φ = 4086200.

The previous prime is 8172391. The next prime is 8172419. The reversal of 8172404 is 4042718.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 1567504 = 2570^2 + 1252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021547 + ... + 1021554.

It is an arithmetic number, because the mean of its divisors is an integer number (2383619).

Almost surely, 2^8172404 is an apocalyptic number.

It is an amenable number.

8172404 is a deficient number, since it is larger than the sum of its proper divisors (6129310).

8172404 is a wasteful number, since it uses less digits than its factorization.

8172404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043105 (or 2043103 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 8172404 is about 2858.7416812297. The cubic root of 8172404 is about 201.4265012805.

The spelling of 8172404 in words is "eight million, one hundred seventy-two thousand, four hundred four".