1948453390 has 64 divisors (see below), whose sum is σ = 3834008640. Its totient is φ = 712882560.

The previous prime is 1948453361. The next prime is 1948453417. The reversal of 1948453390 is 933548491.

It is a happy number.

It is a super-2 number, since 2×1948453390² = 7592941226004984200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1948453390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2877732 + ... + 2878408.

It is an arithmetic number, because the mean of its divisors is an integer number (59906385).

Almost surely, 2^1948453390 is an apocalyptic number.

1948453390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1948453390 is a deficient number, since it is larger than the sum of its proper divisors (1885555250).

1948453390 is a wasteful number, since it uses less digits than its factorization.

1948453390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1948453390 is about 44141.2889481039. The cubic root of 1948453390 is about 1249.0025942237.

The spelling of 1948453390 in words is "one billion, nine hundred forty-eight million, four hundred fifty-three thousand, three hundred ninety".