40446644240 has 40 divisors (see below), whose sum is σ = 94250806848. Its totient is φ = 16142122880.

The previous prime is 40446644213. The next prime is 40446644257. The reversal of 40446644240 is 4244664404.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 40446644194 and 40446644203.

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, 535196 + ... + 606075.

Almost surely, 2^40446644240 is an apocalyptic number.

40446644240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40446644240 is an abundant number, since it is smaller than the sum of its proper divisors (53804162608).

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

40446644240 is a wasteful number, since it uses less digits than its factorization.

40446644240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141727 (or 1141721 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 38.

The spelling of 40446644240 in words is "forty billion, four hundred forty-six million, six hundred forty-four thousand, two hundred forty".