4029940 has 12 divisors (see below), whose sum is σ = 8462916. Its totient is φ = 1611968.

The previous prime is 4029937. The next prime is 4029943. The reversal of 4029940 is 499204.

It is an interprime number because it is at equal distance from previous prime (4029937) and next prime (4029943).

It can be written as a sum of positive squares in 2 ways, for example, as 1227664 + 2802276 = 1108^2 + 1674^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4029899 and 4029908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4029943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100729 + ... + 100768.

It is an arithmetic number, because the mean of its divisors is an integer number (705243).

Almost surely, 2^4029940 is an apocalyptic number.

It is an amenable number.

4029940 is an abundant number, since it is smaller than the sum of its proper divisors (4432976).

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

4029940 is a wasteful number, since it uses less digits than its factorization.

4029940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201506 (or 201504 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 4029940 is about 2007.4710458684. The cubic root of 4029940 is about 159.1351776869.

The spelling of 4029940 in words is "four million, twenty-nine thousand, nine hundred forty".