1901028640 has 48 divisors (see below), whose sum is σ = 5132780352. Its totient is φ = 651780864.

The previous prime is 1901028631. The next prime is 1901028707. The reversal of 1901028640 is 468201091.

It is a happy number.

It is a super-2 number, since 2×1901028640² = 7227819780200499200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 847554 + ... + 849793.

It is an arithmetic number, because the mean of its divisors is an integer number (106932924).

Almost surely, 2^1901028640 is an apocalyptic number.

1901028640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901028640 is an abundant number, since it is smaller than the sum of its proper divisors (3231751712).

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

1901028640 is a wasteful number, since it uses less digits than its factorization.

1901028640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697369 (or 1697361 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1901028640 is about 43600.7871488578. The cubic root of 1901028640 is about 1238.7858041754.

The spelling of 1901028640 in words is "one billion, nine hundred one million, twenty-eight thousand, six hundred forty".