61267728 has 40 divisors (see below), whose sum is σ = 167587488. Its totient is φ = 19220992.

The previous prime is 61267727. The next prime is 61267741. The reversal of 61267728 is 82776216.

It is not an unprimeable number, because it can be changed into a prime (61267727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36726 + ... + 38357.

Almost surely, 2^61267728 is an apocalyptic number.

61267728 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61267728 is an abundant number, since it is smaller than the sum of its proper divisors (106319760).

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

61267728 is a wasteful number, since it uses less digits than its factorization.

61267728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75111 (or 75105 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 61267728 is about 7827.3704396815. The cubic root of 61267728 is about 394.2247851961.

The spelling of 61267728 in words is "sixty-one million, two hundred sixty-seven thousand, seven hundred twenty-eight".