1428007631 has 2 divisors, whose sum is σ = 1428007632. Its totient is φ = 1428007630.

The previous prime is 1428007577. The next prime is 1428007657. The reversal of 1428007631 is 1367008241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428007631 - 2²² = 1423813327 is a prime.

It is a super-2 number, since 2×1428007631² = 4078411588388464322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428007661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714003815 + 714003816.

It is an arithmetic number, because the mean of its divisors is an integer number (714003816).

Almost surely, 2^1428007631 is an apocalyptic number.

1428007631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428007631 is an equidigital number, since it uses as much as digits as its factorization.

1428007631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1428007631 is about 37788.9882240845. The cubic root of 1428007631 is about 1126.0996999237.

The spelling of 1428007631 in words is "one billion, four hundred twenty-eight million, seven thousand, six hundred thirty-one".