1690738142 has 16 divisors (see below), whose sum is σ = 2785656960. Its totient is φ = 766054872.

The previous prime is 1690738141. The next prime is 1690738157. The reversal of 1690738142 is 2418370961.

It is a super-2 number, since 2×1690738142² = 5717190929627224328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1690738142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690738141) 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, 966368 + ... + 968115.

It is an arithmetic number, because the mean of its divisors is an integer number (174103560).

Almost surely, 2^1690738142 is an apocalyptic number.

1690738142 is a deficient number, since it is larger than the sum of its proper divisors (1094918818).

1690738142 is a wasteful number, since it uses less digits than its factorization.

1690738142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934527.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1690738142 is about 41118.5863327036. The cubic root of 1690738142 is about 1191.3118179624.

The spelling of 1690738142 in words is "one billion, six hundred ninety million, seven hundred thirty-eight thousand, one hundred forty-two".