4000432020 has 96 divisors (see below), whose sum is σ = 12215723520. Its totient is φ = 972241920.

The previous prime is 4000432001. The next prime is 4000432039. The reversal of 4000432020 is 202340004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4000432001) and next prime (4000432039).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29160 + ... + 94080.

It is an arithmetic number, because the mean of its divisors is an integer number (127247120).

Almost surely, 2^4000432020 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 4000432020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6107861760).

4000432020 is an abundant number, since it is smaller than the sum of its proper divisors (8215291500).

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

4000432020 is a wasteful number, since it uses less digits than its factorization.

4000432020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65025 (or 65023 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4000432020 is about 63248.9685291389. The cubic root of 4000432020 is about 1587.4581989944.

Adding to 4000432020 its reverse (202340004), we get a palindrome (4202772024).

The spelling of 4000432020 in words is "four billion, four hundred thirty-two thousand, twenty".