7863428 has 12 divisors (see below), whose sum is σ = 13802460. Its totient is φ = 3919872.

The previous prime is 7863407. The next prime is 7863433. The reversal of 7863428 is 8243687.

It can be written as a sum of positive squares in 2 ways, for example, as 2256004 + 5607424 = 1502^2 + 2368^2 .

It is a super-2 number, since 2×7863428² = 123666999822368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 7⁸ + 8 + 6⁴ + 3³ + 4² + 2⁷ + 8⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 7863391 and 7863400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373 + ... + 4196.

It is an arithmetic number, because the mean of its divisors is an integer number (1150205).

Almost surely, 2^7863428 is an apocalyptic number.

It is an amenable number.

7863428 is a deficient number, since it is larger than the sum of its proper divisors (5939032).

7863428 is a wasteful number, since it uses less digits than its factorization.

7863428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926 (or 5924 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 7863428 is about 2804.1804506843. The cubic root of 7863428 is about 198.8553615112.

The spelling of 7863428 in words is "seven million, eight hundred sixty-three thousand, four hundred twenty-eight".