61240388 has 48 divisors (see below), whose sum is σ = 121504320. Its totient is φ = 26764800.

The previous prime is 61240381. The next prime is 61240391. The reversal of 61240388 is 88304216.

It is not an unprimeable number, because it can be changed into a prime (61240381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149528 + ... + 149936.

It is an arithmetic number, because the mean of its divisors is an integer number (2531340).

Almost surely, 2^61240388 is an apocalyptic number.

It is an amenable number.

61240388 is a deficient number, since it is larger than the sum of its proper divisors (60263932).

61240388 is a wasteful number, since it uses less digits than its factorization.

61240388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 61240388 is about 7825.6238090008. The cubic root of 61240388 is about 394.1661370868.

The spelling of 61240388 in words is "sixty-one million, two hundred forty thousand, three hundred eighty-eight".