1692139680 has 384 divisors, whose sum is σ = 7385333760. Its totient is φ = 351544320.

The previous prime is 1692139651. The next prime is 1692139697. The reversal of 1692139680 is 869312961.

It is a happy number.

1692139680 is a `hidden beast` number, since 169 + 21 + 396 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 330097 + ... + 335183.

It is an arithmetic number, because the mean of its divisors is an integer number (19232640).

Almost surely, 2^1692139680 is an apocalyptic number.

1692139680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1692139680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3692666880).

1692139680 is an abundant number, since it is smaller than the sum of its proper divisors (5693194080).

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

1692139680 is a wasteful number, since it uses less digits than its factorization.

1692139680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1692139680 is about 41135.6254358676. The cubic root of 1692139680 is about 1191.6409065019.

The spelling of 1692139680 in words is "one billion, six hundred ninety-two million, one hundred thirty-nine thousand, six hundred eighty".