61319240 has 32 divisors (see below), whose sum is σ = 142421760. Its totient is φ = 23736000.

The previous prime is 61319201. The next prime is 61319267. The reversal of 61319240 is 4291316.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23486 + ... + 25965.

It is an arithmetic number, because the mean of its divisors is an integer number (4450680).

Almost surely, 2^61319240 is an apocalyptic number.

It is an amenable number.

61319240 is an abundant number, since it is smaller than the sum of its proper divisors (81102520).

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

61319240 is a wasteful number, since it uses less digits than its factorization.

61319240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49493 (or 49489 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 61319240 is about 7830.6602531332. The cubic root of 61319240 is about 394.3352382258.

The spelling of 61319240 in words is "sixty-one million, three hundred nineteen thousand, two hundred forty".