61589990 has 32 divisors (see below), whose sum is σ = 138219264. Its totient is φ = 19196640.

The previous prime is 61589959. The next prime is 61589993. The reversal of 61589990 is 9998516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61589993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39224 + ... + 40763.

It is an arithmetic number, because the mean of its divisors is an integer number (4319352).

Almost surely, 2^61589990 is an apocalyptic number.

61589990 is an abundant number, since it is smaller than the sum of its proper divisors (76629274).

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

61589990 is a wasteful number, since it uses less digits than its factorization.

61589990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80012.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 61589990 is about 7847.9290261826. The cubic root of 61589990 is about 394.9147709080.

The spelling of 61589990 in words is "sixty-one million, five hundred eighty-nine thousand, nine hundred ninety".