40147389 has 12 divisors (see below), whose sum is σ = 58348576. Its totient is φ = 26599752.

The previous prime is 40147381. The next prime is 40147391. The reversal of 40147389 is 98374104.

It is a happy number.

It is not a de Polignac number, because 40147389 - 2³ = 40147381 is a prime.

It is a super-2 number, since 2×40147389² = 3223625687034642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40147381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12217 + ... + 15150.

Almost surely, 2^40147389 is an apocalyptic number.

It is an amenable number.

40147389 is a deficient number, since it is larger than the sum of its proper divisors (18201187).

40147389 is a wasteful number, since it uses less digits than its factorization.

40147389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27536 (or 27533 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 40147389 is about 6336.1967299004. The cubic root of 40147389 is about 342.4147272040.

The spelling of 40147389 in words is "forty million, one hundred forty-seven thousand, three hundred eighty-nine".