3993263428 has 36 divisors (see below), whose sum is σ = 8868161232. Its totient is φ = 1555816080.

The previous prime is 3993263411. The next prime is 3993263471. The reversal of 3993263428 is 8243623993.

It is a happy number.

It is a super-2 number, since 2×3993263428² = 31892305610804622368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 923926 + ... + 928237.

It is an arithmetic number, because the mean of its divisors is an integer number (246337812).

Almost surely, 2^3993263428 is an apocalyptic number.

It is an amenable number.

3993263428 is an abundant number, since it is smaller than the sum of its proper divisors (4874897804).

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

3993263428 is a wasteful number, since it uses less digits than its factorization.

3993263428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852192 (or 1852183 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 49.

The square root of 3993263428 is about 63192.2734833935. The cubic root of 3993263428 is about 1586.5094144424.

The spelling of 3993263428 in words is "three billion, nine hundred ninety-three million, two hundred sixty-three thousand, four hundred twenty-eight".