40149387440 has 40 divisors (see below), whose sum is σ = 94219750800. Its totient is φ = 15909660416.

The previous prime is 40149387437. The next prime is 40149387451. The reversal of 40149387440 is 4478394104.

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

It is a super-2 number, since 2×40149387440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40149387391 and 40149387400.

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, 2336615 + ... + 2353734.

It is an arithmetic number, because the mean of its divisors is an integer number (2355493770).

Almost surely, 2^40149387440 is an apocalyptic number.

40149387440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40149387440 is an abundant number, since it is smaller than the sum of its proper divisors (54070363360).

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

40149387440 is a wasteful number, since it uses less digits than its factorization.

40149387440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690469 (or 4690463 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 40149387440 in words is "forty billion, one hundred forty-nine million, three hundred eighty-seven thousand, four hundred forty".