61881470 has 32 divisors (see below), whose sum is σ = 129102336. Its totient is φ = 20916000.

The previous prime is 61881451. The next prime is 61881481. The reversal of 61881470 is 7418816.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 61881470.

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, 1256 + ... + 11195.

It is an arithmetic number, because the mean of its divisors is an integer number (4034448).

Almost surely, 2^61881470 is an apocalyptic number.

61881470 is an abundant number, since it is smaller than the sum of its proper divisors (67220866).

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

61881470 is a wasteful number, since it uses less digits than its factorization.

61881470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12536.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 61881470 is about 7866.4776107226. The cubic root of 61881470 is about 395.5367802333.

The spelling of 61881470 in words is "sixty-one million, eight hundred eighty-one thousand, four hundred seventy".