61839402 has 8 divisors (see below), whose sum is σ = 123678816. Its totient is φ = 20613132.

The previous prime is 61839377. The next prime is 61839403. The reversal of 61839402 is 20493816.

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

61839402 is an admirable number.

It is a super-2 number, since 2×61839402² = 7648223279435208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61839403) 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, 5153278 + ... + 5153289.

It is an arithmetic number, because the mean of its divisors is an integer number (15459852).

Almost surely, 2^61839402 is an apocalyptic number.

61839402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61839402 is a wasteful number, since it uses less digits than its factorization.

61839402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10306572.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 61839402 is about 7863.8032783126. The cubic root of 61839402 is about 395.4471291995.

The spelling of 61839402 in words is "sixty-one million, eight hundred thirty-nine thousand, four hundred two".