61491238 has 8 divisors (see below), whose sum is σ = 92324232. Its totient is φ = 30716496.

The previous prime is 61491203. The next prime is 61491251. The reversal of 61491238 is 83219416.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11820 + ... + 16207.

It is an arithmetic number, because the mean of its divisors is an integer number (11540529).

Almost surely, 2^61491238 is an apocalyptic number.

61491238 is a deficient number, since it is larger than the sum of its proper divisors (30832994).

61491238 is a wasteful number, since it uses less digits than its factorization.

61491238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29126.

The product of its digits is 10368, while the sum is 34.

The square root of 61491238 is about 7841.6349060639. The cubic root of 61491238 is about 394.7035921910.

The spelling of 61491238 in words is "sixty-one million, four hundred ninety-one thousand, two hundred thirty-eight".