64400046 has 64 divisors (see below), whose sum is σ = 144281088. Its totient is φ = 19058688.

The previous prime is 64400041. The next prime is 64400057. The reversal of 64400046 is 64000446.

It is a junction number, because it is equal to n+sod(n) for n = 64399989 and 64400025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227421 + ... + 227703.

It is an arithmetic number, because the mean of its divisors is an integer number (2254392).

Almost surely, 2^64400046 is an apocalyptic number.

64400046 is an abundant number, since it is smaller than the sum of its proper divisors (79881042).

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

64400046 is a wasteful number, since it uses less digits than its factorization.

64400046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 64400046 is about 8024.9639251526. The cubic root of 64400046 is about 400.8316986615.

The spelling of 64400046 in words is "sixty-four million, four hundred thousand, forty-six".