61990888 has 32 divisors (see below), whose sum is σ = 121968000. Its totient is φ = 29481408.

The previous prime is 61990837. The next prime is 61990897. The reversal of 61990888 is 88809916.

It is a happy number.

It is a Smith number, since the sum of its digits (49) 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 7 ways as a sum of consecutive naturals, for example, 35770 + ... + 37462.

It is an arithmetic number, because the mean of its divisors is an integer number (3811500).

Almost surely, 2^61990888 is an apocalyptic number.

It is an amenable number.

61990888 is a deficient number, since it is larger than the sum of its proper divisors (59977112).

61990888 is a wasteful number, since it uses less digits than its factorization.

61990888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 61990888 is about 7873.4292401723. The cubic root of 61990888 is about 395.7697706050.

The spelling of 61990888 in words is "sixty-one million, nine hundred ninety thousand, eight hundred eighty-eight".