1838656497 has 8 divisors (see below), whose sum is σ = 2503702656. Its totient is φ = 1199690672.

The previous prime is 1838656489. The next prime is 1838656499. The reversal of 1838656497 is 7946568381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1838656497 - 2³ = 1838656489 is a prime.

It is a super-2 number, since 2×1838656497² = 6761315427920622018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1838656499) 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, 6519918 + ... + 6520199.

It is an arithmetic number, because the mean of its divisors is an integer number (312962832).

Almost surely, 2^1838656497 is an apocalyptic number.

It is an amenable number.

1838656497 is a deficient number, since it is larger than the sum of its proper divisors (665046159).

1838656497 is a wasteful number, since it uses less digits than its factorization.

1838656497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13040167.

The product of its digits is 8709120, while the sum is 57.

The square root of 1838656497 is about 42879.5580317708. The cubic root of 1838656497 is about 1225.0868181146.

The spelling of 1838656497 in words is "one billion, eight hundred thirty-eight million, six hundred fifty-six thousand, four hundred ninety-seven".