69399828 has 36 divisors (see below), whose sum is σ = 181927200. Its totient is φ = 23132952.

The previous prime is 69399821. The next prime is 69399833. The reversal of 69399828 is 82899396.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×69399828² = 9632672252859168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69399821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34728 + ... + 36671.

Almost surely, 2^69399828 is an apocalyptic number.

It is an amenable number.

69399828 is an abundant number, since it is smaller than the sum of its proper divisors (112527372).

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

69399828 is a wasteful number, since it uses less digits than its factorization.

69399828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71418 (or 71404 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 69399828 is about 8330.6559165530. The cubic root of 69399828 is about 410.9472999721.

The spelling of 69399828 in words is "sixty-nine million, three hundred ninety-nine thousand, eight hundred twenty-eight".