61630398 has 24 divisors (see below), whose sum is σ = 133738488. Its totient is φ = 20511792.

The previous prime is 61630351. The next prime is 61630411. The reversal of 61630398 is 89303616.

It is a happy number.

61630398 is a `hidden beast` number, since 616 + 3 + 0 + 39 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11365 + ... + 15887.

It is an arithmetic number, because the mean of its divisors is an integer number (5572437).

Almost surely, 2^61630398 is an apocalyptic number.

61630398 is an abundant number, since it is smaller than the sum of its proper divisors (72108090).

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

61630398 is a wasteful number, since it uses less digits than its factorization.

61630398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288 (or 5285 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 61630398 is about 7850.5030412070. The cubic root of 61630398 is about 395.0011173391.

The spelling of 61630398 in words is "sixty-one million, six hundred thirty thousand, three hundred ninety-eight".