61683870 has 32 divisors (see below), whose sum is σ = 153148320. Its totient is φ = 15881600.

The previous prime is 61683829. The next prime is 61683883. The reversal of 61683870 is 7838616.

It is a congruent number.

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, 34581 + ... + 36320.

It is an arithmetic number, because the mean of its divisors is an integer number (4785885).

Almost surely, 2^61683870 is an apocalyptic number.

61683870 is an abundant number, since it is smaller than the sum of its proper divisors (91464450).

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

61683870 is a wasteful number, since it uses less digits than its factorization.

61683870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70940.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 61683870 is about 7853.9079444567. The cubic root of 61683870 is about 395.1153217733.

The spelling of 61683870 in words is "sixty-one million, six hundred eighty-three thousand, eight hundred seventy".