61381936 has 40 divisors (see below), whose sum is σ = 148276224. Its totient is φ = 23914560.

The previous prime is 61381907. The next prime is 61381937. The reversal of 61381936 is 63918316.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 61381895 and 61381904.

It is not an unprimeable number, because it can be changed into a prime (61381937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23680 + ... + 26143.

Almost surely, 2^61381936 is an apocalyptic number.

It is an amenable number.

61381936 is an abundant number, since it is smaller than the sum of its proper divisors (86894288).

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

61381936 is a wasteful number, since it uses less digits than its factorization.

61381936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49849 (or 49843 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 61381936 is about 7834.6624687985. The cubic root of 61381936 is about 394.4695887753.

The spelling of 61381936 in words is "sixty-one million, three hundred eighty-one thousand, nine hundred thirty-six".