61620878 has 8 divisors (see below), whose sum is σ = 100834200. Its totient is φ = 28009480.

The previous prime is 61620877. The next prime is 61620917. The reversal of 61620878 is 87802616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400453 + ... + 1400496.

It is an arithmetic number, because the mean of its divisors is an integer number (12604275).

Almost surely, 2^61620878 is an apocalyptic number.

61620878 is a deficient number, since it is larger than the sum of its proper divisors (39213322).

61620878 is a wasteful number, since it uses less digits than its factorization.

61620878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800962.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 61620878 is about 7849.8966872182. The cubic root of 61620878 is about 394.9807777859.

The spelling of 61620878 in words is "sixty-one million, six hundred twenty thousand, eight hundred seventy-eight".