40015458 has 90 divisors (see below), whose sum is σ = 105793083. Its totient is φ = 11271960.

The previous prime is 40015441. The next prime is 40015483. The reversal of 40015458 is 85451004.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 20007729 = 4473^2 + 4473^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4473.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 563563 + ... + 563633.

Almost surely, 2^40015458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40015458

40015458 is an abundant number, since it is smaller than the sum of its proper divisors (65777625).

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

40015458 is an equidigital number, since it uses as much as digits as its factorization.

40015458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 40015458 is about 6325.7772644949. Note that the first 3 decimals coincide. The cubic root of 40015458 is about 342.0392383419.

Multiplying 40015458 by its product of nonzero digits (3200), we get a square (128049465600 = 357840²).

The spelling of 40015458 in words is "forty million, fifteen thousand, four hundred fifty-eight".