61990632 has 96 divisors (see below), whose sum is σ = 189540000. Its totient is φ = 18130560.

The previous prime is 61990627. The next prime is 61990633. The reversal of 61990632 is 23609916.

61990632 is a `hidden beast` number, since 6 + 19 + 9 + 0 + 632 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (61990633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21619 + ... + 24317.

It is an arithmetic number, because the mean of its divisors is an integer number (1974375).

Almost surely, 2^61990632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61990632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94770000).

61990632 is an abundant number, since it is smaller than the sum of its proper divisors (127549368).

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

61990632 is a wasteful number, since it uses less digits than its factorization.

61990632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 61990632 is about 7873.4129829446. The cubic root of 61990632 is about 395.7692258088.

The spelling of 61990632 in words is "sixty-one million, nine hundred ninety thousand, six hundred thirty-two".