1990462420 has 24 divisors (see below), whose sum is σ = 4399970400. Its totient is φ = 754280352.

The previous prime is 1990462417. The next prime is 1990462423. The reversal of 1990462420 is 242640991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1990462417) and next prime (1990462423).

It is a self number, because there is not a number n which added to its sum of digits gives 1990462420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990462423) 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, 2618650 + ... + 2619409.

It is an arithmetic number, because the mean of its divisors is an integer number (183332100).

Almost surely, 2^1990462420 is an apocalyptic number.

1990462420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990462420 is an abundant number, since it is smaller than the sum of its proper divisors (2409507980).

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

1990462420 is a wasteful number, since it uses less digits than its factorization.

1990462420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238087 (or 5238085 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1990462420 is about 44614.5987318053. The cubic root of 1990462420 is about 1257.9150915418.

The spelling of 1990462420 in words is "one billion, nine hundred ninety million, four hundred sixty-two thousand, four hundred twenty".