3891480 has 32 divisors (see below), whose sum is σ = 11674800. Its totient is φ = 1037696.

The previous prime is 3891469. The next prime is 3891493. The reversal of 3891480 is 841983.

It is an Ulam number.

It is a congruent number.

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, 16095 + ... + 16334.

Almost surely, 2^3891480 is an apocalyptic number.

3891480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3891480 is an abundant number, since it is smaller than the sum of its proper divisors (7783320).

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

3891480 is a wasteful number, since it uses less digits than its factorization.

3891480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32443 (or 32439 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 3891480 is about 1972.6834515451. The cubic root of 3891480 is about 157.2913841688.

It can be divided in two parts, 3891 and 480, that added together give a triangular number (4371 = T₉₃).

The spelling of 3891480 in words is "three million, eight hundred ninety-one thousand, four hundred eighty".