61403808 has 96 divisors (see below), whose sum is σ = 170311680. Its totient is φ = 19342080.

The previous prime is 61403807. The next prime is 61403809. The reversal of 61403808 is 80830416.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61403807) and next prime (61403809).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (61403803) 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, 139653 + ... + 140091.

It is an arithmetic number, because the mean of its divisors is an integer number (1774080).

Almost surely, 2^61403808 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 61403808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85155840).

61403808 is an abundant number, since it is smaller than the sum of its proper divisors (108907872).

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

61403808 is a wasteful number, since it uses less digits than its factorization.

61403808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 61403808 is about 7836.0581927395. The cubic root of 61403808 is about 394.5164365117.

The spelling of 61403808 in words is "sixty-one million, four hundred three thousand, eight hundred eight".