2001478 has 24 divisors (see below), whose sum is σ = 3343032. Its totient is φ = 895104.

The previous prime is 2001469. The next prime is 2001481. The reversal of 2001478 is 8741002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46525 + ... + 46567.

It is an arithmetic number, because the mean of its divisors is an integer number (139293).

2^2001478 is an apocalyptic number.

2001478 is a deficient number, since it is larger than the sum of its proper divisors (1341554).

2001478 is a wasteful number, since it uses less digits than its factorization.

2001478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 2001478 is about 1414.7360177786. The cubic root of 2001478 is about 126.0231334026.

The spelling of 2001478 in words is "two million, one thousand, four hundred seventy-eight".