61285740 has 24 divisors (see below), whose sum is σ = 171600240. Its totient is φ = 16342848.

The previous prime is 61285739. The next prime is 61285747. The reversal of 61285740 is 4758216.

It is not an unprimeable number, because it can be changed into a prime (61285747) 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, 510655 + ... + 510774.

It is an arithmetic number, because the mean of its divisors is an integer number (7150010).

Almost surely, 2^61285740 is an apocalyptic number.

61285740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61285740 is an abundant number, since it is smaller than the sum of its proper divisors (110314500).

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

61285740 is a wasteful number, since it uses less digits than its factorization.

61285740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021441 (or 1021439 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 61285740 is about 7828.5209331010. The cubic root of 61285740 is about 394.2634139126.

The spelling of 61285740 in words is "sixty-one million, two hundred eighty-five thousand, seven hundred forty".