1992459420 has 72 divisors (see below), whose sum is σ = 6907197024. Its totient is φ = 455419008.

The previous prime is 1992459419. The next prime is 1992459457. The reversal of 1992459420 is 249542991.

1992459420 is a `hidden beast` number, since 19 + 9 + 24 + 594 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 789399 + ... + 791918.

It is an arithmetic number, because the mean of its divisors is an integer number (95933292).

Almost surely, 2^1992459420 is an apocalyptic number.

1992459420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1992459420 is an abundant number, since it is smaller than the sum of its proper divisors (4914737604).

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

1992459420 is a wasteful number, since it uses less digits than its factorization.

1992459420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581339 (or 1581334 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1992459420 is about 44636.9736877401. The cubic root of 1992459420 is about 1258.3356331503.

The spelling of 1992459420 in words is "one billion, nine hundred ninety-two million, four hundred fifty-nine thousand, four hundred twenty".