61372290 has 32 divisors (see below), whose sum is σ = 168336000. Its totient is φ = 14027904.

The previous prime is 61372279. The next prime is 61372291. The reversal of 61372290 is 9227316.

61372290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (61372291) 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 15 ways as a sum of consecutive naturals, for example, 145915 + ... + 146334.

It is an arithmetic number, because the mean of its divisors is an integer number (5260500).

Almost surely, 2^61372290 is an apocalyptic number.

61372290 is an abundant number, since it is smaller than the sum of its proper divisors (106963710).

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

61372290 is a wasteful number, since it uses less digits than its factorization.

61372290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292266.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 61372290 is about 7834.0468469368. The cubic root of 61372290 is about 394.4489244277.

The spelling of 61372290 in words is "sixty-one million, three hundred seventy-two thousand, two hundred ninety".