46390640 has 20 divisors (see below), whose sum is σ = 107858424. Its totient is φ = 18556224.

The previous prime is 46390621. The next prime is 46390649. The reversal of 46390640 is 4609364.

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

It is a junction number, because it is equal to n+sod(n) for n = 46390597 and 46390606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46390649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289862 + ... + 290021.

Almost surely, 2^46390640 is an apocalyptic number.

46390640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

46390640 is an abundant number, since it is smaller than the sum of its proper divisors (61467784).

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

46390640 is a wasteful number, since it uses less digits than its factorization.

46390640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579896 (or 579890 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 46390640 is about 6811.0674640617. The cubic root of 46390640 is about 359.3161916625.

The spelling of 46390640 in words is "forty-six million, three hundred ninety thousand, six hundred forty".