1345471990 has 32 divisors (see below), whose sum is σ = 2523013920. Its totient is φ = 516153600.

The previous prime is 1345471973. The next prime is 1345471991. The reversal of 1345471990 is 991745431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345471991) 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, 3621 + ... + 52000.

It is an arithmetic number, because the mean of its divisors is an integer number (78844185).

Almost surely, 2^1345471990 is an apocalyptic number.

1345471990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1345471990 is a deficient number, since it is larger than the sum of its proper divisors (1177541930).

1345471990 is a wasteful number, since it uses less digits than its factorization.

1345471990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55728.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1345471990 is about 36680.6759752325. The cubic root of 1345471990 is about 1103.9724113345.

The spelling of 1345471990 in words is "one billion, three hundred forty-five million, four hundred seventy-one thousand, nine hundred ninety".