61932390 has 64 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 15168384.

The previous prime is 61932361. The next prime is 61932433. The reversal of 61932390 is 9323916.

It is a super-2 number, since 2×61932390² = 7671241862224200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147601 + ... + 148019.

It is an arithmetic number, because the mean of its divisors is an integer number (2513700).

Almost surely, 2^61932390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61932390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80438400).

61932390 is an abundant number, since it is smaller than the sum of its proper divisors (98944410).

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

61932390 is a wasteful number, since it uses less digits than its factorization.

61932390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 61932390 is about 7869.7134636529. The cubic root of 61932390 is about 395.6452414093.

The spelling of 61932390 in words is "sixty-one million, nine hundred thirty-two thousand, three hundred ninety".