1351391628 has 12 divisors (see below), whose sum is σ = 3153247160. Its totient is φ = 450463872.

The previous prime is 1351391599. The next prime is 1351391647. The reversal of 1351391628 is 8261931531.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56307973 + ... + 56307996.

Almost surely, 2^1351391628 is an apocalyptic number.

It is an amenable number.

1351391628 is an abundant number, since it is smaller than the sum of its proper divisors (1801855532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1351391628 is a wasteful number, since it uses less digits than its factorization.

1351391628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112615976 (or 112615974 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1351391628 is about 36761.2789222573. The cubic root of 1351391628 is about 1105.5890822414.

The spelling of 1351391628 in words is "one billion, three hundred fifty-one million, three hundred ninety-one thousand, six hundred twenty-eight".