72401744 has 10 divisors (see below), whose sum is σ = 140278410. Its totient is φ = 36200864.

The previous prime is 72401743. The next prime is 72401773. The reversal of 72401744 is 44710427.

It can be written as a sum of positive squares in only one way, i.e., 69089344 + 3312400 = 8312^2 + 1820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72401743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2262539 + ... + 2262570.

It is an arithmetic number, because the mean of its divisors is an integer number (14027841).

Almost surely, 2^72401744 is an apocalyptic number.

It is an amenable number.

72401744 is a deficient number, since it is larger than the sum of its proper divisors (67876666).

72401744 is a wasteful number, since it uses less digits than its factorization.

72401744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525117 (or 4525111 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 72401744 is about 8508.9214357638. The cubic root of 72401744 is about 416.7890902842.

The spelling of 72401744 in words is "seventy-two million, four hundred one thousand, seven hundred forty-four".