61902390 has 48 divisors (see below), whose sum is σ = 163309104. Its totient is φ = 15005760.

The previous prime is 61902383. The next prime is 61902397. The reversal of 61902390 is 9320916.

61902390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61902383) and next prime (61902397).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61902397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4897 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (3402273).

Almost surely, 2^61902390 is an apocalyptic number.

61902390 is an abundant number, since it is smaller than the sum of its proper divisors (101406714).

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

61902390 is a wasteful number, since it uses less digits than its factorization.

61902390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17085 (or 17074 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 61902390 is about 7867.8071913336. The cubic root of 61902390 is about 395.5813476790.

The spelling of 61902390 in words is "sixty-one million, nine hundred two thousand, three hundred ninety".