61910988 has 12 divisors (see below), whose sum is σ = 144459000. Its totient is φ = 20636992.

The previous prime is 61910941. The next prime is 61911007. The reversal of 61910988 is 88901916.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×61910988² = 7665940870272288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579613 + ... + 2579636.

It is an arithmetic number, because the mean of its divisors is an integer number (12038250).

Almost surely, 2^61910988 is an apocalyptic number.

It is an amenable number.

61910988 is an abundant number, since it is smaller than the sum of its proper divisors (82548012).

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

61910988 is a wasteful number, since it uses less digits than its factorization.

61910988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159256 (or 5159254 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 61910988 is about 7868.3535761937. The cubic root of 61910988 is about 395.5996617321.

The spelling of 61910988 in words is "sixty-one million, nine hundred ten thousand, nine hundred eighty-eight".