61422400 has 84 divisors (see below), whose sum is σ = 162818572. Its totient is φ = 22671360.

The previous prime is 61422391. The next prime is 61422457. The reversal of 61422400 is 422416.

It can be written as a sum of positive squares in 6 ways, for example, as 1700416 + 59721984 = 1304^2 + 7728^2 .

It is a super-2 number, since 2×61422400² = 7545422443520000, which contains 22 as substring.

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, 19324 + ... + 22276.

Almost surely, 2^61422400 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 61422400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81409286).

61422400 is an abundant number, since it is smaller than the sum of its proper divisors (101396172).

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

61422400 is a wasteful number, since it uses less digits than its factorization.

61422400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 61422400 is about 7837.2444136954. The cubic root of 61422400 is about 394.5562500545.

Adding to 61422400 its reverse (422416), we get a palindrome (61844816).

The spelling of 61422400 in words is "sixty-one million, four hundred twenty-two thousand, four hundred".