920451840 has 432 divisors, whose sum is σ = 3705886464. Its totient is φ = 190586880.

The previous prime is 920451839. The next prime is 920451869. The reversal of 920451840 is 48154029.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3252339 + ... + 3252621.

Almost surely, 2^920451840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920451840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852943232).

920451840 is an abundant number, since it is smaller than the sum of its proper divisors (2785434624).

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

920451840 is a wasteful number, since it uses less digits than its factorization.

920451840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 920451840 is about 30338.9492237289. The cubic root of 920451840 is about 972.7480228173.

The spelling of 920451840 in words is "nine hundred twenty million, four hundred fifty-one thousand, eight hundred forty".