61532340 has 48 divisors (see below), whose sum is σ = 172730880. Its totient is φ = 16366720.

The previous prime is 61532329. The next prime is 61532371. The reversal of 61532340 is 4323516.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61532340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27670 + ... + 29810.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^61532340 is an apocalyptic number.

61532340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61532340 is an abundant number, since it is smaller than the sum of its proper divisors (111198540).

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

61532340 is a wasteful number, since it uses less digits than its factorization.

61532340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632 (or 2630 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 61532340 is about 7844.2552227729. The cubic root of 61532340 is about 394.7915152529.

Adding to 61532340 its reverse (4323516), we get a palindrome (65855856).

The spelling of 61532340 in words is "sixty-one million, five hundred thirty-two thousand, three hundred forty".