72401630 has 16 divisors (see below), whose sum is σ = 148940640. Its totient is φ = 24823392.

The previous prime is 72401621. The next prime is 72401653. The reversal of 72401630 is 3610427.

It is a junction number, because it is equal to n+sod(n) for n = 72401596 and 72401605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517085 + ... + 517224.

It is an arithmetic number, because the mean of its divisors is an integer number (9308790).

Almost surely, 2^72401630 is an apocalyptic number.

72401630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72401630 is an abundant number, since it is smaller than the sum of its proper divisors (76539010).

72401630 is a wasteful number, since it uses less digits than its factorization.

72401630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034323.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72401630 is about 8508.9147369098. The cubic root of 72401630 is about 416.7888715326.

The spelling of 72401630 in words is "seventy-two million, four hundred one thousand, six hundred thirty".