1406997428 has 6 divisors (see below), whose sum is σ = 2462245506. Its totient is φ = 703498712.

The previous prime is 1406997373. The next prime is 1406997457. The reversal of 1406997428 is 8247996041.

It can be written as a sum of positive squares in only one way, i.e., 1394873104 + 12124324 = 37348^2 + 3482^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175874675 + ... + 175874682.

It is an arithmetic number, because the mean of its divisors is an integer number (410374251).

Almost surely, 2^1406997428 is an apocalyptic number.

It is an amenable number.

1406997428 is a deficient number, since it is larger than the sum of its proper divisors (1055248078).

1406997428 is a wasteful number, since it uses less digits than its factorization.

1406997428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351749361 (or 351749359 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 1406997428 is about 37509.9643828143. The cubic root of 1406997428 is about 1120.5496419953.

The spelling of 1406997428 in words is "one billion, four hundred six million, nine hundred ninety-seven thousand, four hundred twenty-eight".