1406639055 has 16 divisors (see below), whose sum is σ = 2328230880. Its totient is φ = 724338048.

The previous prime is 1406639053. The next prime is 1406639057. The reversal of 1406639055 is 5509366041.

It is an interprime number because it is at equal distance from previous prime (1406639053) and next prime (1406639057).

It is not a de Polignac number, because 1406639055 - 2¹ = 1406639053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406639053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616392 + ... + 1617261.

It is an arithmetic number, because the mean of its divisors is an integer number (145514430).

Almost surely, 2^1406639055 is an apocalyptic number.

1406639055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1406639055 is a deficient number, since it is larger than the sum of its proper divisors (921591825).

1406639055 is a wasteful number, since it uses less digits than its factorization.

1406639055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233690.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 1406639055 is about 37505.1870412614. The cubic root of 1406639055 is about 1120.4544963970.

The spelling of 1406639055 in words is "one billion, four hundred six million, six hundred thirty-nine thousand, fifty-five".