3951428 has 12 divisors (see below), whose sum is σ = 7447020. Its totient is φ = 1823712.

The previous prime is 3951427. The next prime is 3951443. The reversal of 3951428 is 8241593.

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 3564544 = 622^2 + 1888^2 .

It is a super-2 number, since 2×3951428² = 31227566478368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3951394 and 3951403.

It is not an unprimeable number, because it can be changed into a prime (3951421) 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, 37943 + ... + 38046.

It is an arithmetic number, because the mean of its divisors is an integer number (620585).

Almost surely, 2^3951428 is an apocalyptic number.

It is an amenable number.

3951428 is a deficient number, since it is larger than the sum of its proper divisors (3495592).

3951428 is a wasteful number, since it uses less digits than its factorization.

3951428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76006 (or 76004 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 3951428 is about 1987.8199113602. The cubic root of 3951428 is about 158.0949597409.

The spelling of 3951428 in words is "three million, nine hundred fifty-one thousand, four hundred twenty-eight".