61431398 has 48 divisors (see below), whose sum is σ = 112569984. Its totient is φ = 25038720.

The previous prime is 61431373. The next prime is 61431479. The reversal of 61431398 is 89313416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221636 + ... + 221912.

It is an arithmetic number, because the mean of its divisors is an integer number (2345208).

Almost surely, 2^61431398 is an apocalyptic number.

61431398 is a deficient number, since it is larger than the sum of its proper divisors (51138586).

61431398 is a wasteful number, since it uses less digits than its factorization.

61431398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 390 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 61431398 is about 7837.8184464811. The cubic root of 61431398 is about 394.5755157936.

The spelling of 61431398 in words is "sixty-one million, four hundred thirty-one thousand, three hundred ninety-eight".