61439532 has 192 divisors, whose sum is σ = 193536000. Its totient is φ = 15005760.

The previous prime is 61439531. The next prime is 61439533. The reversal of 61439532 is 23593416.

It is an interprime number because it is at equal distance from previous prime (61439531) and next prime (61439533).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 61439493 and 61439502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61439531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1041319 + ... + 1041377.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^61439532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61439532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96768000).

61439532 is an abundant number, since it is smaller than the sum of its proper divisors (132096468).

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

61439532 is a wasteful number, since it uses less digits than its factorization.

61439532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 105 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 61439532 is about 7838.3373236931. The cubic root of 61439532 is about 394.5929299917.

The spelling of 61439532 in words is "sixty-one million, four hundred thirty-nine thousand, five hundred thirty-two".