61690884 has 48 divisors (see below), whose sum is σ = 148780800. Its totient is φ = 19883776.

The previous prime is 61690879. The next prime is 61690927. The reversal of 61690884 is 48809616.

61690884 = T₆ + T₇ + ... + T₇₁₇.

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 15 ways as a sum of consecutive naturals, for example, 49582 + ... + 50810.

It is an arithmetic number, because the mean of its divisors is an integer number (3099600).

Almost surely, 2^61690884 is an apocalyptic number.

It is an amenable number.

61690884 is an abundant number, since it is smaller than the sum of its proper divisors (87089916).

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

61690884 is a wasteful number, since it uses less digits than its factorization.

61690884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 61690884 is about 7854.3544610617. The cubic root of 61690884 is about 395.1302972378.

The spelling of 61690884 in words is "sixty-one million, six hundred ninety thousand, eight hundred eighty-four".