61158438 has 48 divisors (see below), whose sum is σ = 145080000. Its totient is φ = 18465840.

The previous prime is 61158389. The next prime is 61158439. The reversal of 61158438 is 83485116.

61158438 is a `hidden beast` number, since 611 + 5 + 8 + 4 + 38 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61158439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98493 + ... + 99111.

It is an arithmetic number, because the mean of its divisors is an integer number (3022500).

Almost surely, 2^61158438 is an apocalyptic number.

61158438 is an abundant number, since it is smaller than the sum of its proper divisors (83921562).

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

61158438 is a wasteful number, since it uses less digits than its factorization.

61158438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1134 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 61158438 is about 7820.3860518519. The cubic root of 61158438 is about 393.9902382767.

It can be divided in two parts, 611 and 58438, that added together give a 10-th power (59049 = 3¹⁰).

The spelling of 61158438 in words is "sixty-one million, one hundred fifty-eight thousand, four hundred thirty-eight".