72407740 has 12 divisors (see below), whose sum is σ = 152056296. Its totient is φ = 28963088.

The previous prime is 72407729. The next prime is 72407747. The reversal of 72407740 is 4770427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72407747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810174 + ... + 1810213.

It is an arithmetic number, because the mean of its divisors is an integer number (12671358).

Almost surely, 2^72407740 is an apocalyptic number.

It is an amenable number.

72407740 is an abundant number, since it is smaller than the sum of its proper divisors (79648556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72407740 is a wasteful number, since it uses less digits than its factorization.

72407740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620396 (or 3620394 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 72407740 is about 8509.2737645465. The cubic root of 72407740 is about 416.8005955245.

The spelling of 72407740 in words is "seventy-two million, four hundred seven thousand, seven hundred forty".