7828406 has 4 divisors (see below), whose sum is σ = 11742612. Its totient is φ = 3914202.

The previous prime is 7828397. The next prime is 7828411. The reversal of 7828406 is 6048287.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×7828406² = 122567881001672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957100 + ... + 1957103.

It is an arithmetic number, because the mean of its divisors is an integer number (2935653).

Almost surely, 2^7828406 is an apocalyptic number.

7828406 is a deficient number, since it is larger than the sum of its proper divisors (3914206).

7828406 is a wasteful number, since it uses less digits than its factorization.

7828406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914205.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 7828406 is about 2797.9288768659. The cubic root of 7828406 is about 198.5597026158.

The spelling of 7828406 in words is "seven million, eight hundred twenty-eight thousand, four hundred six".