1690509534 has 32 divisors (see below), whose sum is σ = 4067393280. Its totient is φ = 457581312.

The previous prime is 1690509533. The next prime is 1690509617. The reversal of 1690509534 is 4359050961.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690509533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058419 + ... + 1060014.

It is an arithmetic number, because the mean of its divisors is an integer number (127106040).

Almost surely, 2^1690509534 is an apocalyptic number.

1690509534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1690509534 is an abundant number, since it is smaller than the sum of its proper divisors (2376883746).

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

1690509534 is a wasteful number, since it uses less digits than its factorization.

1690509534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118464.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 1690509534 is about 41115.8063766236. The cubic root of 1690509534 is about 1191.2581223445.

The spelling of 1690509534 in words is "one billion, six hundred ninety million, five hundred nine thousand, five hundred thirty-four".