61400412 has 36 divisors (see below), whose sum is σ = 157084200. Its totient is φ = 20219232.

The previous prime is 61400387. The next prime is 61400483. The reversal of 61400412 is 21400416.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7287 + ... + 13262.

It is an arithmetic number, because the mean of its divisors is an integer number (4363450).

Almost surely, 2^61400412 is an apocalyptic number.

It is an amenable number.

61400412 is an abundant number, since it is smaller than the sum of its proper divisors (95683788).

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

61400412 is a wasteful number, since it uses less digits than its factorization.

61400412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20642 (or 20637 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 61400412 is about 7835.8414991627. The cubic root of 61400412 is about 394.5091633334.

Adding to 61400412 its reverse (21400416), we get a palindrome (82800828).

The spelling of 61400412 in words is "sixty-one million, four hundred thousand, four hundred twelve".