872404 has 24 divisors (see below), whose sum is σ = 1732640. Its totient is φ = 381024.

The previous prime is 872393. The next prime is 872411. The reversal of 872404 is 404278.

872404 = T₇₄ + T₇₅ + ... + T₁₇₇.

It is a super-2 number, since 2×872404² = 1522177478432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

872404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547 + ... + 1429.

2⁸⁷²⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

872404 is a deficient number, since it is larger than the sum of its proper divisors (860236).

872404 is a wasteful number, since it uses less digits than its factorization.

872404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 872404 is about 934.0256955780. The cubic root of 872404 is about 95.5518755468.

The spelling of 872404 in words is "eight hundred seventy-two thousand, four hundred four".