61432420 has 48 divisors (see below), whose sum is σ = 149482368. Its totient is φ = 20770560.

The previous prime is 61432409. The next prime is 61432457. The reversal of 61432420 is 2423416.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61432391 and 61432400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7215 + ... + 13225.

It is an arithmetic number, because the mean of its divisors is an integer number (3114216).

Almost surely, 2^61432420 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 61432420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74741184).

61432420 is an abundant number, since it is smaller than the sum of its proper divisors (88049948).

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

61432420 is a wasteful number, since it uses less digits than its factorization.

61432420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 6098 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 61432420 is about 7837.8836429230. The cubic root of 61432420 is about 394.5777038926.

Adding to 61432420 its reverse (2423416), we get a palindrome (63855836).

The spelling of 61432420 in words is "sixty-one million, four hundred thirty-two thousand, four hundred twenty".