13777209428 has 24 divisors (see below), whose sum is σ = 25729385472. Its totient is φ = 6432338304.

The previous prime is 13777209427. The next prime is 13777209431. The reversal of 13777209428 is 82490277731.

It is a happy number.

It is a super-2 number, since 2×13777209428² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13777209427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789026 + ... + 806297.

It is an arithmetic number, because the mean of its divisors is an integer number (1072057728).

Almost surely, 2^13777209428 is an apocalyptic number.

It is an amenable number.

13777209428 is a deficient number, since it is larger than the sum of its proper divisors (11952176044).

13777209428 is a wasteful number, since it uses less digits than its factorization.

13777209428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595471 (or 1595469 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 13777209428 in words is "thirteen billion, seven hundred seventy-seven million, two hundred nine thousand, four hundred twenty-eight".