420519840 has 96 divisors (see below), whose sum is σ = 1426553856. Its totient is φ = 103511040.

The previous prime is 420519823. The next prime is 420519877. The reversal of 420519840 is 48915024.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27456 + ... + 39935.

It is an arithmetic number, because the mean of its divisors is an integer number (14859936).

Almost surely, 2^420519840 is an apocalyptic number.

420519840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420519840 is an abundant number, since it is smaller than the sum of its proper divisors (1006034016).

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

420519840 is a wasteful number, since it uses less digits than its factorization.

420519840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67422 (or 67414 counting only the distinct ones).

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

The square root of 420519840 is about 20506.5804072741. The cubic root of 420519840 is about 749.1960808154.

The spelling of 420519840 in words is "four hundred twenty million, five hundred nineteen thousand, eight hundred forty".