4040621840 has 80 divisors (see below), whose sum is σ = 9774612480. Its totient is φ = 1551674880.

The previous prime is 4040621813. The next prime is 4040621861. The reversal of 4040621840 is 481260404.

It is a tau number, because it is divible by the number of its divisors (80).

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, 308546 + ... + 321374.

It is an arithmetic number, because the mean of its divisors is an integer number (122182656).

Almost surely, 2^4040621840 is an apocalyptic number.

4040621840 is a gapful number since it is divisible by the number (40) 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 4040621840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4887306240).

4040621840 is an abundant number, since it is smaller than the sum of its proper divisors (5733990640).

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

4040621840 is a wasteful number, since it uses less digits than its factorization.

4040621840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13000 (or 12994 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 4040621840 is about 63565.8858193607. The cubic root of 4040621840 is about 1592.7565594237.

The spelling of 4040621840 in words is "four billion, forty million, six hundred twenty-one thousand, eight hundred forty".