424029978 has 80 divisors (see below), whose sum is σ = 997349760. Its totient is φ = 134396064.

The previous prime is 424029919. The next prime is 424029989. The reversal of 424029978 is 879920424.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1180963 + ... + 1181321.

It is an arithmetic number, because the mean of its divisors is an integer number (12466872).

Almost surely, 2^424029978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424029978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498674880).

424029978 is an abundant number, since it is smaller than the sum of its proper divisors (573319782).

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

424029978 is a wasteful number, since it uses less digits than its factorization.

424029978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 424029978 is about 20591.9881992973. The cubic root of 424029978 is about 751.2748557625.

The spelling of 424029978 in words is "four hundred twenty-four million, twenty-nine thousand, nine hundred seventy-eight".