170138640 has 80 divisors (see below), whose sum is σ = 602782848. Its totient is φ = 38888448.

The previous prime is 170138627. The next prime is 170138653. The reversal of 170138640 is 46831071.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (170138627) and next prime (170138653).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 170138598 and 170138607.

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, 48957 + ... + 52316.

Almost surely, 2^170138640 is an apocalyptic number.

170138640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

170138640 is an abundant number, since it is smaller than the sum of its proper divisors (432644208).

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

170138640 is a wasteful number, since it uses less digits than its factorization.

170138640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101296 (or 101290 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 170138640 is about 13043.7203281886. The cubic root of 170138640 is about 554.1163765646.

The spelling of 170138640 in words is "one hundred seventy million, one hundred thirty-eight thousand, six hundred forty".