61861492 has 108 divisors (see below), whose sum is σ = 147917280. Its totient is φ = 22096800.

The previous prime is 61861469. The next prime is 61861493. The reversal of 61861492 is 29416816.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61861493) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1995517 + ... + 1995547.

Almost surely, 2^61861492 is an apocalyptic number.

61861492 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61861492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73958640).

61861492 is an abundant number, since it is smaller than the sum of its proper divisors (86055788).

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

61861492 is a wasteful number, since it uses less digits than its factorization.

61861492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 70 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 61861492 is about 7865.2076895655. The cubic root of 61861492 is about 395.4942102237.

The spelling of 61861492 in words is "sixty-one million, eight hundred sixty-one thousand, four hundred ninety-two".