61526730 has 32 divisors (see below), whose sum is σ = 148616064. Its totient is φ = 16301376.

The previous prime is 61526687. The next prime is 61526749. The reversal of 61526730 is 3762516.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822 + ... + 11241.

It is an arithmetic number, because the mean of its divisors is an integer number (4644252).

Almost surely, 2^61526730 is an apocalyptic number.

61526730 is an abundant number, since it is smaller than the sum of its proper divisors (87089334).

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

61526730 is a wasteful number, since it uses less digits than its factorization.

61526730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13230.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 61526730 is about 7843.8976280928. The cubic root of 61526730 is about 394.7795169676.

The spelling of 61526730 in words is "sixty-one million, five hundred twenty-six thousand, seven hundred thirty".