40388487 has 8 divisors (see below), whose sum is σ = 53880960. Its totient is φ = 26910840.

The previous prime is 40388473. The next prime is 40388489. The reversal of 40388487 is 78488304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40388487 - 2¹⁶ = 40322951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 11682.

It is an arithmetic number, because the mean of its divisors is an integer number (6735120).

Almost surely, 2^40388487 is an apocalyptic number.

40388487 is a deficient number, since it is larger than the sum of its proper divisors (13492473).

40388487 is a wasteful number, since it uses less digits than its factorization.

40388487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7413.

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 40388487 is about 6355.1937027914. The cubic root of 40388487 is about 343.0987965763.

The spelling of 40388487 in words is "forty million, three hundred eighty-eight thousand, four hundred eighty-seven".