61791290 has 32 divisors (see below), whose sum is σ = 123405120. Its totient is φ = 22086400.

The previous prime is 61791283. The next prime is 61791307. The reversal of 61791290 is 9219716.

It is a self number, because there is not a number n which added to its sum of digits gives 61791290.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1730 + ... + 11250.

It is an arithmetic number, because the mean of its divisors is an integer number (3856410).

Almost surely, 2^61791290 is an apocalyptic number.

61791290 is a deficient number, since it is larger than the sum of its proper divisors (61613830).

61791290 is a wasteful number, since it uses less digits than its factorization.

61791290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9598.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 61791290 is about 7860.7436035022. The cubic root of 61791290 is about 395.3445479546.

The spelling of 61791290 in words is "sixty-one million, seven hundred ninety-one thousand, two hundred ninety".