61419840 has 112 divisors (see below), whose sum is σ = 196852032. Its totient is φ = 16224256.

The previous prime is 61419829. The next prime is 61419857. The reversal of 61419840 is 4891416.

It is a congruent number.

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, 131287 + ... + 131753.

Almost surely, 2^61419840 is an apocalyptic number.

61419840 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 61419840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98426016).

61419840 is an abundant number, since it is smaller than the sum of its proper divisors (135432192).

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

61419840 is a wasteful number, since it uses less digits than its factorization.

61419840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 61419840 is about 7837.0810892832. The cubic root of 61419840 is about 394.5507684602.

The spelling of 61419840 in words is "sixty-one million, four hundred nineteen thousand, eight hundred forty".