61216390 has 32 divisors (see below), whose sum is σ = 114579360. Its totient is φ = 23548000.

The previous prime is 61216373. The next prime is 61216417. The reversal of 61216390 is 9361216.

It is a congruent number.

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, 243765 + ... + 244015.

It is an arithmetic number, because the mean of its divisors is an integer number (3580605).

Almost surely, 2^61216390 is an apocalyptic number.

61216390 is a deficient number, since it is larger than the sum of its proper divisors (53362970).

61216390 is an equidigital number, since it uses as much as digits as its factorization.

61216390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 61216390 is about 7824.0903624639. The cubic root of 61216390 is about 394.1146436464.

The spelling of 61216390 in words is "sixty-one million, two hundred sixteen thousand, three hundred ninety".