919720240 has 20 divisors (see below), whose sum is σ = 2138349744. Its totient is φ = 367888064.

The previous prime is 919720229. The next prime is 919720259. The reversal of 919720240 is 42027919.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×919720240³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 919720196 and 919720205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5748172 + ... + 5748331.

Almost surely, 2^919720240 is an apocalyptic number.

It is an amenable number.

919720240 is an abundant number, since it is smaller than the sum of its proper divisors (1218629504).

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

919720240 is a wasteful number, since it uses less digits than its factorization.

919720240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11496516 (or 11496510 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 919720240 is about 30326.8897185320. The cubic root of 919720240 is about 972.4902323658.

The spelling of 919720240 in words is "nine hundred nineteen million, seven hundred twenty thousand, two hundred forty".