1901436240 has 80 divisors (see below), whose sum is σ = 6430320576. Its totient is φ = 460953600.

The previous prime is 1901436223. The next prime is 1901436241. The reversal of 1901436240 is 426341091.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1901436198 and 1901436207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901436241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357481 + ... + 362760.

Almost surely, 2^1901436240 is an apocalyptic number.

1901436240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901436240 is an abundant number, since it is smaller than the sum of its proper divisors (4528884336).

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

1901436240 is a wasteful number, since it uses less digits than its factorization.

1901436240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720268 (or 720262 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1901436240 is about 43605.4611258728. The cubic root of 1901436240 is about 1238.8743339674.

The spelling of 1901436240 in words is "one billion, nine hundred one million, four hundred thirty-six thousand, two hundred forty".