61378930 has 32 divisors (see below), whose sum is σ = 119453760. Its totient is φ = 22628160.

The previous prime is 61378909. The next prime is 61378937. The reversal of 61378930 is 3987316.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 61378930.

It is not an unprimeable number, because it can be changed into a prime (61378937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2665 + ... + 11395.

It is an arithmetic number, because the mean of its divisors is an integer number (3732930).

Almost surely, 2^61378930 is an apocalyptic number.

61378930 is a deficient number, since it is larger than the sum of its proper divisors (58074830).

61378930 is a wasteful number, since it uses less digits than its factorization.

61378930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 61378930 is about 7834.4706266601. The cubic root of 61378930 is about 394.4631493404.

The spelling of 61378930 in words is "sixty-one million, three hundred seventy-eight thousand, nine hundred thirty".