61279272 has 48 divisors (see below), whose sum is σ = 168455040. Its totient is φ = 20119968.

The previous prime is 61279261. The next prime is 61279301. The reversal of 61279272 is 27297216.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1528 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (3509480).

Almost surely, 2^61279272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61279272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84227520).

61279272 is an abundant number, since it is smaller than the sum of its proper divisors (107175768).

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

61279272 is a wasteful number, since it uses less digits than its factorization.

61279272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12782 (or 12775 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61279272 is about 7828.1078173464. The cubic root of 61279272 is about 394.2495434458.

The spelling of 61279272 in words is "sixty-one million, two hundred seventy-nine thousand, two hundred seventy-two".