72904419 has 12 divisors (see below), whose sum is σ = 120350256. Its totient is φ = 41659632.

The previous prime is 72904417. The next prime is 72904421. The reversal of 72904419 is 91440927.

It is an interprime number because it is at equal distance from previous prime (72904417) and next prime (72904421).

It is not a de Polignac number, because 72904419 - 2¹ = 72904417 is a prime.

It is a super-2 number, since 2×72904419² = 10630108619455122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72904417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578544 + ... + 578669.

It is an arithmetic number, because the mean of its divisors is an integer number (10029188).

Almost surely, 2^72904419 is an apocalyptic number.

72904419 is a deficient number, since it is larger than the sum of its proper divisors (47445837).

72904419 is a wasteful number, since it uses less digits than its factorization.

72904419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157226 (or 1157223 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 72904419 is about 8538.4084582550. The cubic root of 72904419 is about 417.7514356699.

The spelling of 72904419 in words is "seventy-two million, nine hundred four thousand, four hundred nineteen".