72861144 has 32 divisors (see below), whose sum is σ = 182382000. Its totient is φ = 24256512.

The previous prime is 72861127. The next prime is 72861161. The reversal of 72861144 is 44116827.

It is an interprime number because it is at equal distance from previous prime (72861127) and next prime (72861161).

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, 25752 + ... + 28440.

Almost surely, 2^72861144 is an apocalyptic number.

It is an amenable number.

72861144 is an abundant number, since it is smaller than the sum of its proper divisors (109520856).

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

72861144 is a wasteful number, since it uses less digits than its factorization.

72861144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827 (or 3823 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 72861144 is about 8535.8739447112. The cubic root of 72861144 is about 417.6687622563.

The spelling of 72861144 in words is "seventy-two million, eight hundred sixty-one thousand, one hundred forty-four".