61788398 has 8 divisors (see below), whose sum is σ = 105922992. Its totient is φ = 26480736.

The previous prime is 61788379. The next prime is 61788401. The reversal of 61788398 is 89388716.

It is a happy number.

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

It is a super-2 number, since 2×61788398² = 7635612254812808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206715 + ... + 2206742.

It is an arithmetic number, because the mean of its divisors is an integer number (13240374).

Almost surely, 2^61788398 is an apocalyptic number.

61788398 is a deficient number, since it is larger than the sum of its proper divisors (44134594).

61788398 is a wasteful number, since it uses less digits than its factorization.

61788398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413466.

The product of its digits is 580608, while the sum is 50.

The square root of 61788398 is about 7860.5596492871. The cubic root of 61788398 is about 395.3383801259.

The spelling of 61788398 in words is "sixty-one million, seven hundred eighty-eight thousand, three hundred ninety-eight".