61487880 has 64 divisors (see below), whose sum is σ = 190425600. Its totient is φ = 15866880.

The previous prime is 61487879. The next prime is 61487903. The reversal of 61487880 is 8878416.

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, 4545 + ... + 11984.

It is an arithmetic number, because the mean of its divisors is an integer number (2975400).

Almost surely, 2^61487880 is an apocalyptic number.

61487880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61487880 is an abundant number, since it is smaller than the sum of its proper divisors (128937720).

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

61487880 is a wasteful number, since it uses less digits than its factorization.

61487880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16574 (or 16570 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 61487880 is about 7841.4207896273. The cubic root of 61487880 is about 394.6964072173.

It can be divided in two parts, 6148 and 7880, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 61487880 in words is "sixty-one million, four hundred eighty-seven thousand, eight hundred eighty".