61998412 has 24 divisors (see below), whose sum is σ = 124173056. Its totient is φ = 26533008.

The previous prime is 61998403. The next prime is 61998451. The reversal of 61998412 is 21489916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28723 + ... + 30805.

Almost surely, 2^61998412 is an apocalyptic number.

It is an amenable number.

61998412 is an abundant number, since it is smaller than the sum of its proper divisors (62174644).

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

61998412 is a wasteful number, since it uses less digits than its factorization.

61998412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 61998412 is about 7873.9070352653. The cubic root of 61998412 is about 395.7857818360.

The spelling of 61998412 in words is "sixty-one million, nine hundred ninety-eight thousand, four hundred twelve".