61407420 has 96 divisors (see below), whose sum is σ = 178752000. Its totient is φ = 15738624.

The previous prime is 61407371. The next prime is 61407431. The reversal of 61407420 is 2470416.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308481 + ... + 308679.

It is an arithmetic number, because the mean of its divisors is an integer number (1862000).

Almost surely, 2^61407420 is an apocalyptic number.

61407420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61407420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89376000).

61407420 is an abundant number, since it is smaller than the sum of its proper divisors (117344580).

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

61407420 is a wasteful number, since it uses less digits than its factorization.

61407420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 61407420 is about 7836.2886623707. The cubic root of 61407420 is about 394.5241720006.

Adding to 61407420 its reverse (2470416), we get a palindrome (63877836).

The spelling of 61407420 in words is "sixty-one million, four hundred seven thousand, four hundred twenty".