61409404 has 24 divisors (see below), whose sum is σ = 125139168. Its totient is φ = 25821120.

The previous prime is 61409399. The next prime is 61409429. The reversal of 61409404 is 40490416.

It is a super-2 number, since 2×61409404² = 7542229799270432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19207 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (5214132).

Almost surely, 2^61409404 is an apocalyptic number.

It is an amenable number.

61409404 is an abundant number, since it is smaller than the sum of its proper divisors (63729764).

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

61409404 is a wasteful number, since it uses less digits than its factorization.

61409404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41445 (or 41443 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 61409404 is about 7836.4152518865. The cubic root of 61409404 is about 394.5284208222.

The spelling of 61409404 in words is "sixty-one million, four hundred nine thousand, four hundred four".