61189740 has 36 divisors (see below), whose sum is σ = 185609424. Its totient is φ = 16317216.

The previous prime is 61189721. The next prime is 61189757. The reversal of 61189740 is 4798116.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61189695 and 61189704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169792 + ... + 170151.

Almost surely, 2^61189740 is an apocalyptic number.

61189740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61189740 is an abundant number, since it is smaller than the sum of its proper divisors (124419684).

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

61189740 is a wasteful number, since it uses less digits than its factorization.

61189740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339958 (or 339953 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61189740 is about 7822.3871036916. The cubic root of 61189740 is about 394.0574439336.

The spelling of 61189740 in words is "sixty-one million, one hundred eighty-nine thousand, seven hundred forty".