61309782 has 12 divisors (see below), whose sum is σ = 132837900. Its totient is φ = 20436588.

The previous prime is 61309763. The next prime is 61309783. The reversal of 61309782 is 28790316.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61309783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1703032 + ... + 1703067.

It is an arithmetic number, because the mean of its divisors is an integer number (11069825).

Almost surely, 2^61309782 is an apocalyptic number.

61309782 is an abundant number, since it is smaller than the sum of its proper divisors (71528118).

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

61309782 is a wasteful number, since it uses less digits than its factorization.

61309782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406107 (or 3406104 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 61309782 is about 7830.0563216365. The cubic root of 61309782 is about 394.3149628361.

The spelling of 61309782 in words is "sixty-one million, three hundred nine thousand, seven hundred eighty-two".