72623905 has 8 divisors (see below), whose sum is σ = 87393600. Its totient is φ = 57935856.

The previous prime is 72623899. The next prime is 72623923. The reversal of 72623905 is 50932627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72623905 - 2¹⁹ = 72099617 is a prime.

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, 18435 + ... + 22024.

It is an arithmetic number, because the mean of its divisors is an integer number (10924200).

Almost surely, 2^72623905 is an apocalyptic number.

It is an amenable number.

72623905 is a deficient number, since it is larger than the sum of its proper divisors (14769695).

72623905 is a wasteful number, since it uses less digits than its factorization.

72623905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40823.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 72623905 is about 8521.9660290334. The cubic root of 72623905 is about 417.2149535768.

The spelling of 72623905 in words is "seventy-two million, six hundred twenty-three thousand, nine hundred five".