1688233954 has 16 divisors (see below), whose sum is σ = 2768497056. Its totient is φ = 765731200.

The previous prime is 1688233949. The next prime is 1688233973. The reversal of 1688233954 is 4593328861.

It is a junction number, because it is equal to n+sod(n) for n = 1688233898 and 1688233907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71887 + ... + 92434.

It is an arithmetic number, because the mean of its divisors is an integer number (173031066).

Almost surely, 2^1688233954 is an apocalyptic number.

1688233954 is a deficient number, since it is larger than the sum of its proper divisors (1080263102).

1688233954 is a wasteful number, since it uses less digits than its factorization.

1688233954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164801.

The product of its digits is 1244160, while the sum is 49.

The square root of 1688233954 is about 41088.1242453340. The cubic root of 1688233954 is about 1190.7233683067.

The spelling of 1688233954 in words is "one billion, six hundred eighty-eight million, two hundred thirty-three thousand, nine hundred fifty-four".