138402845 has 16 divisors (see below), whose sum is σ = 198063360. Its totient is φ = 90777984.

The previous prime is 138402833. The next prime is 138402857. The reversal of 138402845 is 548204831.

It is an interprime number because it is at equal distance from previous prime (138402833) and next prime (138402857).

It is a cyclic number.

It is not a de Polignac number, because 138402845 - 2¹⁸ = 138140701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85160 + ... + 86769.

It is an arithmetic number, because the mean of its divisors is an integer number (12378960).

Almost surely, 2^138402845 is an apocalyptic number.

It is an amenable number.

138402845 is a deficient number, since it is larger than the sum of its proper divisors (59660515).

138402845 is a wasteful number, since it uses less digits than its factorization.

138402845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171964.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 138402845 is about 11764.4738513883. The cubic root of 138402845 is about 517.2672777175.

The spelling of 138402845 in words is "one hundred thirty-eight million, four hundred two thousand, eight hundred forty-five".