1720902492 has 36 divisors (see below), whose sum is σ = 4376761480. Its totient is φ = 570112992.

The previous prime is 1720902479. The next prime is 1720902497. The reversal of 1720902492 is 2942090271.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720902497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140767 + ... + 152502.

Almost surely, 2^1720902492 is an apocalyptic number.

1720902492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1720902492 is an abundant number, since it is smaller than the sum of its proper divisors (2655858988).

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

1720902492 is a wasteful number, since it uses less digits than its factorization.

1720902492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293442 (or 293437 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1720902492 is about 41483.7617869932. The cubic root of 1720902492 is about 1198.3548038054.

The spelling of 1720902492 in words is "one billion, seven hundred twenty million, nine hundred two thousand, four hundred ninety-two".